Cool, cool. By the way, the default identifier of an iPhone is “Firstname’s iPhone”. 
The vpn client is on the device (phone, tablet, etc) so the traffic is encrypted before it goes through WiFi. That’s kinda the main thing about using a vpn.
Actually the default name of an iPhone is “iPhone”. If you setup iTunes or input an email etc for your account it can be changed to the first 5 letters of that email, it can of course display the persons first name as well, or their PC’s name or Macs name if they used it to set the phone up initially. Most of the time though it’s not actually the persons name. Been doing this for many years man. I used to help criminals unlock iPhones that had been stolen so they could be resold. Now I help good people find their lost or stolen iPhones and secure their devices.